visible radiations

The third mode of energy transfer between an object and its environment is via electromagnetic waves (visible light is a kind of electromagnetic wave). Energy transferred in this way is often called thermal radiation, to distinguish it from electromagnetic signals (as in, say, t..

Question: The radiation in the sunlight that gives us the feeling of hotness is ______. 1. visible radiation 2. infra-red 3. red 4. ultra-violet Answer: ..

While all electromagnetic waves travel at the same speed (i.e., velocity 'c' is constant), the type of their radiation differs in the duration of wavelength and consequently their frequencies. An electromagnetic radiation with a long wavelength will have a low frequency and v..

Question: What type of radiations is emitted by a 100 W electric bulb? Answer: Visible light and infra-red radiations are the two types of radiations emitted by a 100 W electric bul..

The solar spectrum of electromagnetic waves include energy packed heat generating waves called radiation waves. As they lie beyond red colour waves of visible spectrum, they are also called 'infra-red rays'. These infrared rays lie in the wave length range of 700-900 mm. T..

Most of the transition elements form colored compounds both in solid state as well as in aqueous solution. It is already studied that the transition metals have incomplete d-orbital. The electrons are to be promoted from a lower energy level to a higher energy level. Some amount of energy is requi..

Elementary Idea of Electron Microscope - In optical microscope, the ray of light can be bent by a lens system. By placing the object and the lens system in such a way, we control the direction of the ray to get a magnified image of the object. Since as 'electron' carriers charge it is possible to c..

Lasers-An Introduction - The laser is an acronym for Light Amplification by Stimulated Emission of Radiation. The laser has been invented and developed in 1959 and 1960. In the laser, the maser principle has been extended to optical or visible light frequencies of 10 1 4 to 10 1..

There are many reactions that are affected by electromagnetic radiations. Chemical reactions, which occur in the presence of visible and ultraviolet light are called photochemical reactions. Photochemical reactions occur only when photons of radiant energy (h n ) are absorbed by..

Question: Harmful radiation emitted by the sun is ______. 1. visible 2. infra-red 3. ultra-violet 4. radio waves Answer: ..